US wage growth and shale industry wage growth are two totally different stories

The national average hourly wage (adjusted for inflation) has
seen either no growth or negative growth since 2007 in states
that don't have much shale oil or natural gas drilling, according
to Deutsche Bank.

Meanwhile, wages have increased quite a bit in shale production
states, which include Texas, North Dakota, Oklahoma,
Louisiana, Pennsylvania, Wyoming, New Mexico, Colorado, Arkansas,
Utah, Kansas, and West Virginia.

Growth in the shale states had been consistently positive, and
was increasing through mid-2014. However, things fell off a bit
as the price of oil has cratered.